화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of the Korean Industrial and Engineering Chemistry, Vol.15, No.6, 611-617, October, 2004
Export Citation
상압 플라즈마 처리된 활성탄소섬유의 표면 특성 및 염화수소 제거
Surface Characteristics and Hydrogen Chloride Removal of Activated Carbon Fibers Modified by Atmospheric Pressure Plasma Treatment
박수진†, 김병주
  • 한국화학연구원 화학소재연구부, 대전 305-600
Soo-Jin Park†, and Byung-Joo Kim
  • Advanced Materials Division, Korea Research Institute of Chemical Technology, Daejeon 305-600, Korea
E-mail:
초록
활성탄소섬유(Activated carbon fibers, ACFs)의 표면에 산소를 포함하는 관능기를 선택적으로 도입하기 위해 상압 산소 플라즈마로 ACFs를 처리하였으며, 플라즈마 처리가 ACFs의 염화수소 제거 효율에 미치는 영향에 대해서 고찰해보았다. 플라즈마 처리된 ACFs의 표면구조의 변화 및 관능기의 변화는 scanning electron microscope (SEM), x-ray photoelectron spectroscopy (XPS) 그리고 Boehm의 적정법을 이용하였으며 비표면적, 기공부피 및 기공크기분포 등의 기공특성은 Brunauer, Emmett, and Teller (BET) 및 D-A 식을 사용하여 분석하였다. 염화수소 제거 효율 측정은 두 가지 범위(1~40, 20~1000 ppm)를 가지는 검지관을 이용하였다. 실험결과 염화수소 제거 효율은 과다하게 처리된 시편을 제외하면 처리량이 증가됨에 따라 제거 특성이 향상되었다. 또한 플라즈마 처리는 ACFs 표면에 OH와 O-C=O 그룹을 새롭게 형성시키는 것이 관찰되었으며, 반면 ACFs 자체의 비표면적은 조금씩 감소되었다. 결론적으로 ACFs의 상압 산소 플라즈마 처리는 ACFs 표면에 새롭게 도입된 산소관능기로 인해 비표면적의 감소에도 불구하고 염화수소 제거 효율을 증가시키는 것으로 관찰되었다.
The atmospheric pressure plasma treatment on activated carbon fibers (ACFs) was carried out to introduce oxygencontaining groups on the carbon surfaces, and the effects of the plasma treatment on HCI removal of the ACFs were investigated. Surface characteristics of the ACFs were determined by X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), and Boehm's titration method. N2/77 K adsorption isotherms were investigated by BET and D-A plot method to characterize the textural properties including specific surface area, pore volume, and pore size distribution. Two types of detecting tubes confirmed the efficiency of hydrochloride removal: one was 1~40 ppm and the other was 20~1000 ppm. The experimental results show that the hydrochloride removal efficiency of the ACFs was increased with the plasma treatment time, resulting from newly formed hydroxyl and carboxylic groups (-OH and O-C=O) on carbon surfaces, within the slightly decreased specific surface areas or pore volumes. These results indicated that the atmospheric pressure plasma treatment led to the increase of hydrochloride removal due to the improvement of active functional groups containing oxygen on the carbon surfaces.
Keywords:activated carbon fibers;atmospheric pressure plasma treatment;adsorption;hydrogen chloride removal
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